<template>
    <div>
        <h3 class="cmt-top">发表评论</h3>
        <textarea placeholder="请输入要BB的内容" maxlength="120" v-model='text'></textarea>
        <mt-button type='primary' size='large' @click="writeComment">发表评论</mt-button>
        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in commentslist" :key="item.add_time">
                <div class="cmt-title">
                    第{{ i + 1 }}楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
                </div>
                <div class="cmt-body">
                    {{ item.content === 'undefined'?'此用户很懒，什么都没留下。':item.content }}
                </div>
            </div>
        </div>
        <mt-button type='danger' size='large' plain @click='getMore'>加载更多</mt-button>
    </div>
</template>

<script>
import {Toast} from 'mint-ui'
export default {
    data(){
        return {
            pageIndex:1, // 默认展示第一页数据
            commentslist:[],
            text:''
        }
    },
    created(){
        this.getComments()
    },
    methods:{
        getComments(){
            this.$http.get('api/getcomments/'+this.parentid+'?pageindex='+this.pageIndex).then(result=>{
                if(result.body.status === 0){
                    console.log(result.body.message)
                    // this.commentslist = result.body.message
                    this.commentslist = this.commentslist.concat(result.body.message)
                }else{
                    Toast("评论获取失败")
                }
            })
        },
        getMore(){
            this.pageIndex ++
            this.getComments()
        },
        writeComment(){
            if(this.text.trim().length === 0){
                return Toast('评论内容不能为空!')
            }
            this.$http.post('api/postcomment/'+ this.parentid, { content:this.text }).then(result=>{
                if(result.body.status === 0){
                    var wObj = { user_name:"匿名用户" , add_time:Date.now() , content:this.text.trim() }
                    this.commentslist.unshift(wObj)
                    this.text = ''
                }else{
                    Toast('添加评论失败!')
                }
            })
        }
    },
    props:['parentid']
}
</script>

<style lang="scss" scoped>
    *{
        margin:0;
        padding:0;
        .cmt-top{
            margin-bottom:10px;
        }
        textarea{
            height:90px;
        }
        .cmt-list{
            margin:10px 0;
            .cmt-item{
                font-size:14px;
                .cmt-title{
                    background-color:#ccc;
                    height:30px;
                    line-height:30px;
                }
                .cmt-body{
                    height:50px;
                    line-height:50px;
                    padding-left:20px;
                }
            }
        }
    }
</style>